CN103582605A

CN103582605A - Polygon compensation coupling for chain and sprocket driven systems

Info

Publication number: CN103582605A
Application number: CN201180071057.5A
Authority: CN
Inventors: W.斯尔布-加夫伦; A.蒂雷克
Original assignee: Otis Elevator Co
Current assignee: Otis Elevator Co
Priority date: 2011-05-23
Filing date: 2011-05-23
Publication date: 2014-02-12
Anticipated expiration: 2031-05-23
Also published as: WO2012161691A1; DE112011105280B4; KR20140024018A; DE112011105280T5; US20170113902A1; JP2014516016A; KR101565465B1; CN103582605B; JP5841244B2; US20140066240A1; US9599201B2; US10647548B2

Abstract

A polygon compensation coupling system (28, 28', 28") for reducing a polygon effect in a chain driven system is disclosed. The polygon compensation coupling system (28, 28', 28") may include a chain sprocket (16) and a main drive (24, 24') in engagement with the chain sprocket (16), such that the engagement defines a compensation curve (42) to reduce the polygon effect.

Description

Polygon compensation unitor for chain and sprocket drive system

Technical field

The disclosure relates generally to chain and sprocket drive system, and relates more particularly to minimize the polygon effect being associated with chain and sprocket drive system such as passenger conveyor system.

Background technology

Passenger conveyor system such as the several types of staircase, moving walkways, movable sidewalk etc. is widely used for effectively carrying from a place to another place stream of people's (or other object) today.Use the region of these passenger conveyor systems often to comprise adrm, hotel, shopping mall, museum, Railway station and other public building.This type of passenger conveyor system conventionally have bridge joint truss structure two platforms (as, top platform and bottom platform).Moving hand-rail and a plurality of step/pedals that guided by the step chains in loop (also referred to as staircase chain) are carried the stream of people between two platforms.Step chains can for example, by step chains chain Wheel-guiding (, driving).Especially, passenger conveyor system generally includes the driver module with motor and main shaft, the one or more main drive chain sprocket wheels of this module drive, and main drive chain sprocket wheel drives step chains sprocket wheel then to move a plurality of steps in circulation loop.

The interaction of step chains and step chains sprocket wheel usually produces fluctuation and vibration.In conjunction with background technology, step chains comprises a plurality of discrete step chain (chain link) linking together by the connector such as pin and carrier bar or roller (connecting link), for example, and sprocket wheel (, step chains sprocket wheel) comprise the briquetting roller with a plurality of soldered tooths, soldered tooth is for meshing and engage the connector (or even engaging possibly step chain) of step chains to rotate and mobile step chains with step chains sprocket wheel.The connector of step chains causes step chains oscillation and wave moving with the engaging of soldered tooth of step chains sprocket wheel.Moving polygon effect or the chordal action of being usually called as of these oscillation and waves, and what not only affect user takes experience (user conventionally experience in passenger conveyor system this oscillation and wave moving), and it causes less desirable friction between step chains and step chains sprocket wheel, thereby shorten the service life of these parts.The noise that the vibration being caused with engaging of step chains sprocket wheel by step chains produces is another problem.

Therefore, wish to alleviate or compensate polygon effect.Past has proposed to reduce or perhaps alleviate the several solution of polygon effect.Generally speaking, the intensity of polygon effect depends on the amplitude of speed (frequency) and the step chain distance (step chains pitch of chain wheel) of step chains.Step chain is apart from larger, and polygon effect is higher.Therefore, polygon effect be reduced, the pitch of step chains can be reduced.Therefore the diameter that, a kind of method that alleviates polygon effect relates to the quantity (this can reduce step chain distance) of the step chain in increase step chains and/or correspondingly increases (a plurality of) step chains sprocket wheel is to increase the quantity (this also can reduce step chain distance effectively) of the tooth on it.Although this technology is actv. improving taking aspect experience of user, has some shortcomings.

For example, due to the increase of component count (for example, step chain and such as other associated components of the step chains of roller, pin, lining, carrier bar etc. and/or more the quantity of hinge wheel increase), the total cost of relevant system increases.In addition, the maintenance that relates to the maintenance of the parts that quantity increases also increases, and the amount that reduces the wearing and tearing that increase between these parts and tear required lubricant also increases.The wearing and tearing of this increase and tearing the service life that can additionally reduce step chains and step chains sprocket wheel.In addition, said method can not solve noise problem discussed above, and due to larger engaging and in fact can increase noise between step chains and step chains sprocket wheel.

Therefore, need a kind of actv. solution of above-mentioned shortcoming that do not exist to compensate polygon effect.Especially, advantageously develop a kind of polygon compensation technique, this technology is improved user's the experience of taking, and does not cause and any extra cost that increases step chain or use larger step chains sprocket wheel to be associated.More advantageously, for example, if the service life that such technology is failure-free, be easy to safeguard, increase (or at least impact negatively) step chains and step chains sprocket wheel (, by reducing wearing and tearing and tearing), and be provided for extraly solving the scheme (by using lubricant still less) of the more environmental protection of polygon effect problem.Further advantageously this technology reduces the noise being produced by step chains and step chains sprocket engagement.

Summary of the invention

According to an aspect of the present disclosure, a kind of polygon compensation system of connections is disclosed.Polygon compensation system of connections can comprise sprocket wheel and master driver.Master driver can with sprocket engagement, make this joint can limit compensated curve to reduce polygon effect.

In addition, the sprocket wheel of polygon compensation system of connections can comprise a plurality of compensation orifices, and each in a plurality of compensation orifices can be circumferentially spaced apart each other approximately equally spacedly.In addition, master driver can join sprocket wheel to by each in a plurality of compensation orifices by corresponding wheel shaft, the rotation of master driver is caused in each in a plurality of compensation orifices of each in corresponding wheel shaft and according to compensated curve, rotate.

Alternatively, the sprocket wheel of passenger conveyor system can have more than first composition surface, and master driver can have more than second composition surface of respective amount, make the roller sliding in more than first and second the corresponding composition surface of sprocket wheel and master driver limit static compensated curve.

In addition, master driver and sprocket wheel can keep constant mean angular velocity with inconstant instantaneous angular velocity rotation simultaneously, make the linear velocity of chain can keep constant.

According to another aspect of the present disclosure, a kind of passenger conveyor system is disclosed.Passenger conveyor system can comprise step chains in circulation loop around a plurality of pedals of step chains chain Wheel-guiding for object is delivered to another place from a place.Step chains sprocket wheel can comprise a plurality of compensation orifices.Passenger conveyor system can additionally comprise the master driver by a plurality of wheel shafts and step chains sprocket engagement, and along with step chains sprocket wheel and master driver are with constant mean angular velocity but the rotation of inconstant instantaneous angular velocity, this joint is limited by compensated curve.

According to another aspect of the present disclosure, a kind of method that reduces the polygon effect in chain drive system is disclosed.The method can comprise provides the chain being guided by sprocket wheel and master driver in circulation loop to move.The method also can comprise and sprocket wheel engaged and made sprocket wheel and master driver with master driver with constant mean angular velocity but inconstant instantaneous angular velocity rotation.The method also can comprise that the curve that affords redress is to keep the linear velocity of the constant of chain.

In addition, the method can be included as sprocket wheel provides a plurality of compensation orifices and by means of a plurality of wheel shafts, master driver is connected to sprocket wheel by a plurality of compensation orifices.In addition, the method can be included in a plurality of compensation orifices and guide a plurality of wheel shafts to limit compensated curve.

Alternatively, the method can be included as each in sprocket wheel and master driver provides a plurality of composition surfaces and the static compensation curve being limited by the roller sliding in the corresponding composition surface of sprocket wheel and master driver is provided.

In addition or alternatively, the present invention can be independently or is comprised in combination one or more in following feature:

Wherein master driver and sprocket wheel are installed to main drive shaft so that rotation;

Its middle sprocket and master driver are with constant mean angular velocity rotation;

Its middle sprocket and master driver rotate with inconstant instantaneous angular velocity;

Its middle sprocket and master driver have inconstant instantaneous angular velocity, keep constant mean angular velocity simultaneously;

Wherein the inconstant instantaneous angular velocity of master driver and sprocket wheel causes the linear velocity of chain to keep constant;

Wherein master driver is main drive chain sprocket wheel; And/or

Wherein master driver is roughly directly by drivings such as gear, wheel shaft and/or motors.

Other advantage and feature are by apparent from the following detailed description of reading by reference to the accompanying drawings.

Accompanying drawing explanation

In order more fully to understand disclosed method and apparatus, should be with reference to the embodiment being shown in further detail in the accompanying drawings, in the accompanying drawings:

Figure 1A illustrates according to the rough schematic view of the passenger conveyor system of at least some embodiment of the present disclosure;

Figure 1B illustrates in greater detail a part for the passenger conveyor system of Fig. 1;

Fig. 2 illustrates according to the front elevation of the step chains sprocket wheel of the passenger conveyor system of Fig. 1 of at least some embodiment of the present disclosure;

Fig. 3 is illustrated in the front schematic view of the first embodiment of the polygon compensation system of connections adopting in the passenger conveyor system of Fig. 1;

Fig. 4 illustrates the lateral plan of the polygon compensation system of connections of Fig. 3;

Fig. 5 illustrates the first step of the cartesian coordinate system mathematical notation of the compensated curve formula of determining polygon compensation system of connections;

Fig. 6 illustrates the second step of cartesian coordinate system mathematical notation of the formula of the compensated curve of determining Fig. 5;

Fig. 7 illustrates the example of geometric configuration of the compensated curve of Fig. 5 and Fig. 6;

Fig. 8 is the front schematic view that the polygon of Fig. 3 compensates the second embodiment of system of connections;

Fig. 9 illustrates the transparent view of the 3rd embodiment of the polygon compensation system of connections of Fig. 3;

Figure 10 A illustrates the first front schematic view of the polygon compensation system of connections of Fig. 9; And

Figure 10 B illustrates the second front schematic view of the polygon compensation system of connections of Fig. 9.

Although following detailed description has provided and provides in connection with some specific embodiment, be to be understood that the scope of the present disclosure should not be limited to these embodiment, on the contrary, provide these embodiment to be only used to exploitativeness and optimal mode object.The scope of the present disclosure is more wide in range than concrete embodiment open and that be encompassed in the final appended claim of this paper with spirit.

The specific embodiment

Referring now to Figure 1A and Figure 1B,, show the exemplary passenger conveyor system 2 according at least some embodiment of the present disclosure.Although shown in passenger conveyor system 2 be staircase, should be appreciated that passenger conveyor system represents that various types of chain drive mechanism ，Gai mechanism engages the driving chain having with the discrete chain link engaging with toothed chain wheel.In addition, passenger conveyor system 2 is not necessarily all the time as shown in the figure on inclined-plane.On the contrary, at least some embodiment, passenger conveyor system 2 can be as in moving walkways level, crooked, spiral or can limit any configuration that other generally adopts.

Although all parts of not shown passenger conveyor system 2, the passenger conveyor system that can be used for the typical types of disclosure object can comprise the bottom platform 4 that is connected to top platform 6 via a plurality of steps (being also referred to as in this article pedal) 8 and truss 10.The step chains 12 with a plurality of step chain 14 can be connected to a plurality of pedals 8 with guiding in the circulation loop between top platform 6 and bottom platform 4 via step chains sprocket wheel 16 (referring to Figure 1B) and mobile these steps.As shown at Figure 1B, passenger conveyor system 2 can additionally comprise driver module 18.Driver module 18 can be arranged on top platform 6 belows and can comprise motor 20, and motor 20 can drive the main drive shaft 22 with machine driving chain sprocket wheel 25 at least indirectly.Machine driving chain sprocket wheel 25 can drive the main drive chain 21 that joins main drive chain sprocket wheel 24 to then.Main drive chain (MDC) sprocket wheel 24 can engage with step chains (STC) sprocket wheel 16 and rotate with mobile step chains 12 simultaneously.Passenger conveyor system 2 also can comprise a pair of moving hand-rail 26 (one of them is only shown in Figure 1A).

Although described the parts of passenger conveyor system 2 above, should be appreciated that some other parts such as gear case, drg etc. that conventionally adopt also can be expected and be considered to be in the scope of the present disclosure in passenger conveyor system.It should also be understood that, although some parts of the above main drive sprocket 24 such as driver module 18 and machine driving chain sprocket wheel 25 are to be driven by chain, but at least some embodiment, one or more can the driving by belt or other common mechanism in these parts.In addition,, at least some embodiment, main drive shaft 22 directly (by means of belt or chain) drives MDC sprocket wheel 24, and does not use machine driving chain sprocket wheel 25 and main drive chain 21.In a further embodiment, main drive shaft 22 can directly drive (by belt or chain) STC sprocket wheel 16, and does not use machine driving chain sprocket wheel 25 or MDC sprocket wheel 24.

Referring now to Fig. 2,, show the front elevation of step chains (STC) sprocket wheel 16 according at least some embodiment of the present disclosure.As shown in the figure, STC sprocket wheel 16 can be circle (or roughly round) dish or wheel and can be installed to main drive shaft 22.STC sprocket wheel 16 can additionally comprise a plurality of teeth 30 that are formed along a circumference thereof, for example, to engage connector (, being roller form) 32 (referring to Fig. 3) of step chains 12 when STC sprocket wheel rotates, so that step chains moves around it.Although three in tooth 30 are only shown in the present embodiment in STC sprocket wheel 16, in other embodiments, the quantity of tooth can change.

On the front surface of STC sprocket wheel 16, be also formed with three compensation orifices 34.As pointed out, each compensation orifice 34 is not circular, but limits when STC sprocket wheel 16 and MDC sprocket wheel 24 rotate with mobile step chains 12 wheel shaft/roller 38 (shown in broken lines in Fig. 2) by the eccentric path moving along it 36.While doing like this, eccentric path 36 limits hereinafter with reference to the described compensated curve 42 of Fig. 7, and this curve can be used to reduce the above polygon effect.Especially, compensated curve 42 can change STC sprocket wheel 16 cireular frequency in case step chains engage and the constant speed that keeps step chains 12 when STC sprocket wheel moves (for example, linear velocity), thus minimize (or possibly even completely eliminate) polygon effect.

With regard to compensation orifice 34, at least some embodiment, they can be arranged to towards the core of STC sprocket wheel 16, adjacent teeth 30 and in abutting connection with main drive shaft 22 with 120 °, triangle configuration interval.Although in the present embodiment, shown three compensation orifices 34, at least some other embodiment, the quantity of compensation orifice can change, and the quantity of compensation orifice is not necessarily equivalent to the quantity of the tooth 30 on STC sprocket wheel 16.In addition, the location in these holes also can change, and they are not necessarily always positioned to the tooth 30 of contiguous STC sprocket wheel 16 or 120 ° separated from one another.In addition, although all compensation orifices 34 are all depicted as, have identical geometric configuration, at least some embodiment, one or more in compensation orifice 42 have and described different radiuses or shape.Being intended that in order to follow the compensated curve as limited in the following drawings of the compensation orifice 34 being shaped and the joint between wheel shaft/roller 38.

Referring now to Fig. 3 and Fig. 4,, show the polygon compensation system of connections 28 according at least some embodiment of the present disclosure.As shown in the figure, step chains 12 can engage with STC sprocket wheel 16, and STC sprocket wheel 16 can engage with MDC sprocket wheel 24 again.Especially, STC sprocket wheel 16 can be installed to main drive shaft 22, as mentioned above.STC sprocket wheel 16 can additionally be clipped between two in MDC sprocket wheel (be also referred to as in this article MDC ring) 24, and in each side of STC sprocket wheel each, as shown in FIG. 4.These two MDC sprocket wheels 24 can be connected to each other and by wheel shaft (being also referred to as in this article roller) 38 and plate 40 around main drive shaft 22 and with respect to STC sprocket wheel 16 holding positions.Especially, each MDC sprocket wheel 24 can be formed with one group three corresponding holes (invisible), make each wheel shaft 38 can through one in two MDC sprocket wheels 24, through one in compensation orifice 34 and pass another in two MDC sprocket wheels.Wheel shaft 38 can be by plate 40 holding positions.In alternative, can adopt other mechanism with the fixing and holding position by wheel shaft 38.

In addition, wheel shaft 38 can connect two MDC sprocket wheels 24 by this way, make along with 16 rotations of MDC sprocket wheel and STC sprocket wheel, wheel shaft 38 along and the roll/guiding of eccentric path 36 of following compensation orifice 34 to limit compensated curve 42.In Fig. 7, illustrate in greater detail the geometric configuration of compensated curve 42.Compensated curve 42 also can be explained with mathematical way, as shown at Fig. 5 and Fig. 6.Wheel shaft 38 by afford redress in STC sprocket wheel 16 hole 34 and the MDC sprocket wheel 24 that rolls in compensation orifice is to limit compensated curve 42, and STC sprocket wheel and MDC sprocket wheel all become and in identical time quantum, rotate 360 °.Especially, MDC sprocket wheel 24 is variable is able to constant mean angular velocity rotation and STC sprocket wheel 16 is variable is able to identical mean angular velocity but any given point in rotation (is for example sentenced difference, non-constant) relative angle speed (, different or inconstant instantaneous angular velocity) rotation, makes the difference of cireular frequency guarantee that step chains 12 keeps moving to compensate (or eliminating even completely possibly) polygon effect with constant speed.In other words, at the relative difference of the instantaneous angular velocity of STC sprocket wheel 16 and MDC sprocket wheel 24, for example, by certain compensated curve (, compensated curve 42), resisted polygon effect, this reduces or has eliminated polygon effect.

Forward now Fig. 5 and Fig. 6 to, for example show, according to the mathematical notation of the compensated curve 42 of at least some embodiment of the present disclosure (, equation).Especially, Fig. 5 for example illustrates, for determining the first step (, system of axes) of the equation of compensated curve 42, and Fig. 6 illustrates this definite second step.Referring specifically to Fig. 5, first, each step chain 14 that can be step chains 12 is determined position and the speed of the point one (1) with coordinate u, as defined hereinafter.In equation, p can refer to such an extent that be the radius of circle that equals the pitch of single step chain 14, and r can refer to equal the radius of circle of the pitch of STC sprocket wheel 16, and point of crossing one (1) can be the intersection point of circle p and r, and can there is the coordinate (x changing with u, y) (for example, x (u), y (u)).

Therefore, putting one (1) position (x (u), y (u)) in cartesian coordinate system can be determined by following formula:

Circle 1 equation:

(x-u) ²+(y-t) ²=p ² (1)

Circle 2 equations:

x ²+y ²=r ² (2)

(2) are inserted in (1):

a=((u ²+r ²+t ²-p ²)/2) (3)

Obtain the general quadratic equation solution of x (u):

(4a)

(4b)

For simplifying particular case, when t=r (5)

(4a) can be converted into

x=((u*(-p ²+2*r ²+u ²))/2+Sqrt[r ⁶+r ⁴*u ²-(r ²*(-p ²+2*r ²+u ²) ²)/4])/(r ²+u ²) (6)

Pitch-radius the correlativity of utilization in having the STC sprocket wheel 16 of z tooth, arc angle w can be expressed as

w=p/z (7)

And radius r can be expressed as

r=p/(2*Sin[w]) (8)

For constant term Sin[w]

Sin[w]=k (9)

Therefore, equation (8) can be written as

p=2*r*k (10)

Equation (10) is inserted in equation (6), and x (u) can be written as following form:

(11)

According to equation (1):

y=t-Sqrt[p ²-(x-u) ²] (12)

Equation (5) and (10) are inserted in equation (12):

y=r-Sqrt[(2*r*k) ²-(x-u) ²] (13)

And equation (11) is inserted in equation (13) and is obtained:

In the position (x (u), the coordinate of y (u)) of determining point one (1) afterwards, putting one (1) speed in x direction and y direction can determine as follows:

To equation (11), ask the derivative of u to obtain a little one (1) speed in x direction:

And ask the derivative of u to obtain a little one (1) speed in y direction to equation (14):

And the absolute value of putting one (1) speed can provide as follows:

v(u)=Sqrt[x'(u) ²+y'(u) ²] (17)

According to the speed of point one (1), by further asking the derivative of u to obtain acceleration/accel in the x and y direction to equation (15) and (16), can determine a little one (1) acceleration/accel.Therefore, to equation (15), differentiate obtains a little one (1) acceleration/accel in x direction, as follows:

And to equation (16), differentiate obtains a little one (1) speed in y direction, as follows:

With

a=Sqrt[x ²+y ²] (20)

After determining point one (1) position about u, speed and acceleration/accel, can determine the position that is positioned at the point two (2) on MDC sprocket wheel 24 for being projected in each value of the u on STC sprocket wheel 16, as shown in FIG. 6, to obtain the equation of the compensated curve 42 on STC sprocket wheel.Especially, STC sprocket wheel 16 can rotate with cireular frequency d φ/dt and acceleration/accel d2 φ/dt2, and compensated curve 42 can be determined by the curve that is positioned at the point two (2) on MDC sprocket wheel 24, put two (2) with constant cireular frequency d θ/dt with respect to STC sprocket rotation.The coordinate of point two (2) can be expressed as (m, n), and compensated curve 42 can be expressed as (m (u), n (u)).In addition put, the junction of the compensation orifice 34 on two (2) wheel shafts 38 that also can refer to MDC sprocket wheel 24 and STC sprocket wheel 16.

The line of point of connection one (1) and point two (2) can be expressed as follows:

b=Sqrt[(x _la-x ₂) ²+(y _1a-y ₂) ²] (21)

X wherein _la, y _lacan obviously by equation (11) and (14), be solved, and different radius (a replaces r) can change as follows by position coordinate:

x _1a=(a/r)*x ₁(22)

y _1a=(a/r)*y ₁(23)

Wherein

(24)

So, put two (2) absolute x position and can be written as following form:

(25)

And put two (2) absolute y position and can be written as following form:

(26)

The relative coordinate m of the point two (2) on STC sprocket wheel 16 can be appointed as:

(27)

And the relative coordinate n of the point on STC sprocket wheel 16 two (2) can be appointed as:

(28)

Therefore, compensated curve 42 can be by point two (2) and equation (27) and (28) appointment.

The example 44 of compensated curve shown in Fig. 7 42.Especially, example 44 by the above point two (2) according to equation (27) and (28) generation of being used for having the STC sprocket wheel of five (5) individual teeth.Although this example 44 relates to the STC sprocket wheel with five (5) individual teeth, can for example, for thering is the STC sprocket wheel 16 of a tooth (, tooth 30) arbitrarily, write out similar compensated curve.

When STC sprocket wheel 16 and MDC sprocket wheel 24 all in the same direction with constant cireular frequency (for example, while identical mean angular velocity) rotating, compensated curve 42 can be by the geometric configuration description (referring to Fig. 7) that is called compensation circle (or how much circles) with radius " e ".This compensation circle can be used as benchmark to determine the quality of compensated curve 42.Especially, compensated curve 42 depart from how much circles fewer (for example, there is no acute angle, sharp ring or self intersection) and amplitude (deviation) less, compensated curve is more level and smooth.The deviation round with geometry is will compensate polygon effect.

In at least some embodiment, passenger's circuit that above-mentioned polygon compensation system of connections 28 can compensate passenger conveyor system 2 effectively (for example, a side towards passenger) polygon effect in, but the polygon effect that may not can effectively compensates its return line (for example, respectively passenger's a side dorsad after STC sprocket wheel 16 and MDC sprocket wheel 24 rotates 180 °).Therefore, in order effectively to compensate the polygon effect in return line, can locate to provide open to the outside world chain link or mandatory curve is (for example in track at STC chain link by making shift joint in " outlet " of the return line to STC sprocket wheel 16 places, transition arcs in staircase) revolution in, in described open to the outside world chain link, in a STC pitch length, STC sprocket wheel 16 STC joint not directed and between two chain links rotates freely.In addition, except the polygon effect being stood by passenger's circuit and return line, during polygon effect can occur in the linear track that departs from STC sprocket wheel 16 and can depend on the frequency of rotation direction, its pitch and the step chains velocity variations of the shape of track deviation and position, step chains 12.

Therefore, in order to compensate polygon effect in passenger's circuit and return line and in order to consider and other deviation of linear track, polygon compensation system of connections 28 can be positioned on the place, summit of arc.For example, when step chains 12 is rotated to 180 ° with constant speed in annular rotary track, compensated curve 42 can be limited to and only slightly depart from the above place, summit (locating at 90 °) of the arc bow of the geometric configuration of described compensation circle, symmetrical and be used for compensating for example, polygon effect on two STC driving directions (, passenger's circuit and return line) of STC sprocket wheel 24 with linear track circuit.Therefore, the STC sprocket wheel 24 that has the pitch of 135.46 millimeters and rotate 180 ° of degree in the circle of 190 millimeters of diameters can be limited at summit place and in diametric(al), depart from approximately 4 millimeters and very level and smooth compensated curve 42, thereby effectively compensates polygon effect.

Referring now to Fig. 8,, according at least some embodiment of the present disclosure, the schematic diagram of the second embodiment of polygon compensation system of connections 28 illustrates as 28'.Due to polygon compensation system of connections, 28' is roughly similar to polygon compensation system of connections 28, for simplicity, and here by the difference being only described between the two.As shown in the figure, be similar to polygon compensation system of connections 28, polygon compensation system of connections 28' can comprise the step chains 12 with a plurality of step chain 14 and connector 32, and when step chains is when the STC sprocket wheel of rotation moves, connector 32 engages with the tooth 30 of STC sprocket wheel 16.STC sprocket wheel 16 also has three compensation orifices 34, and these compensation orifices limit compensated curve 42.Compare the polygon compensation system of connections 28 that MDC sprocket wheel 24 is wherein depicted as circle (or circular), polygon compensation system of connections 28' adopts MDC sprocket wheel 24', and MDC sprocket wheel 24' is the shape of triangle (or general triangular) and can roughly directly passes through the drivings such as gear, wheel shaft, motor.

Although can only see a MDC sprocket wheel 24' in Fig. 8, should be appreciated that and can adopt two MDC sprocket wheel 24' that link together, as discussed above with reference to MDC sprocket wheel 24.In addition, MDC sprocket wheel 24' can roughly be similar to 24 ground operation and the work of MDC sprocket wheel, because MDC sprocket wheel 24' can adopt wheel shaft/roller 38 and plate 40 (invisible) to engage compensation orifice 34, STC sprocket wheel 16 moves according to the compensated curve 42 limiting.Compensated curve 42 can be expressed by the equation of above deriving (27) and (28).

It is also understood that MDC sprocket wheel 24 and 24' are only two examples that can be used for the MDC sprocket wheel type of the disclosure object.In other embodiments, allowing to engage with STC sprocket wheel 16 the some not isomorphism types that also therewith limit as mentioned above the MDC sprocket wheel of compensated curve 42 may be utilized and be considered as in the scope of the present disclosure.In addition,, at least some embodiment, do not adopt MDC sprocket wheel 24.On the contrary, at the joint between MDC sprocket wheel 24 and STC sprocket wheel 16, can be limited between belt or chain transmission machinery driving chain sprocket wheel 25 (referring to Figure 1B) and STC sprocket wheel 16, make the joint between machine driving chain sprocket wheel and STC sprocket wheel limit compensated curve 42.In alternative, STC sprocket wheel 16 can directly drive to limit compensated curve 42 by main drive shaft 22 by belt and/or chain.

Forward now Fig. 9 and Figure 10 A-10B to, according at least some embodiment of the present disclosure, the 3rd embodiment of polygon compensation system of connections 28 is depicted as 28 ".Compare polygon compensation system of connections 28 and 28', " adopt static plate 50 and the composition surface in STC sprocket wheel 16 (for example; linear slot) 51 and the corresponding composition surface (for example; linear slot) 52 (only the linear slot in MDC sprocket wheel is visible in Fig. 9) in MDC sprocket wheel 24 with the circumference being limited by the compensated curve 42 of determining above, they can be installed to center around common-midpoint 54 to polygon compensation system of connections 28.MDC sprocket wheel 24 can be connected to STC sprocket wheel 16 by system fixing device 56.

Because compensated curve 42 is fixed, it drives junction 58 by this way, make when MDC sprocket wheel 24 and STC sprocket wheel 16 with identical (for example, constant) mean angular velocity but with different (for example, non-constant) instantaneous angular velocity when rotation, step chains 12 keeps the linear velocity of constants.Especially, wheel shaft/roller 38 or other low-friction elements engage the surface (as clearlying show that in Figure 10 B) of static plate 50 and slide in linear slot 51 and 52, and the different angular motions of STC sprocket wheel 16 and MDC sprocket wheel 24 are driven by the dynamic radial position of roller and the different angles of linear slot respectively.Particularly, the linear slot 51 and 52 of STC sprocket wheel 16 and MDC sprocket wheel 24 is respectively with certain angle of intersection.This angle arranges that for example, on the surface of the compensated curve 42 that shim element mid point can be pressed onto to fixed compensation parts (, static plate 50) (moving inward towards center), this can then be embodied in the movement of roller/wheel shaft 38.Alternatively, according to the above angle, shim element mid point can be forced on the opposite side of compensated curve 42 (outwards moving), and this can cause again compensation orifice (negative (negative) parts of diagram fixed compensation parts 50).

Should be appreciated that some other geometric configuratioies (for example, arc) that can adopt

linear slot

51 and 52, and the place of these slits and position also can correspondingly change.In addition, at least some embodiment, compensated curve 42 can be by making STC sprocket wheel 16 and MDC sprocket wheel 24 to turn round for the constant speed of the concrete geometric configuration of

linear slot

51 and 52, and determine the fixed compensation curve 42 for this speed.In this case, compensated curve 42 can be limited by the differential equation, and this equation can be derived to be similar to above described mode.

Although the above composition surface is

linear slot

51 and 52, in other embodiments, linear slot can for example, by allowing other configuration that limits as mentioned above compensated curve 42 (, fixing compensated curve) to be replaced.In addition,, although described polygon compensation system of connections 28 in conjunction with passenger conveyor system 2 above, should be appreciated that instruction of the present disclosure is considered to be applicable to stand any chain and sprocket drive system of polygon effect and be used for reducing its polygon effect.

industrial usability

In general, the disclosure has been set forth for minimizing the polygon compensation system of connections of the polygon effect that the chain drive system of (or eliminating even completely possibly) such as passenger conveyor system runs into.Especially, in certain embodiments, polygon compensation system of connections is related to afford redress hole and make at least one MDC sprocket wheel and STC sprocket engagement by wheel shaft or roller of STC sprocket wheel, make along with STC sprocket wheel and the rotation of MDC sprocket wheel, wheel shaft or roller rotate to limit compensated curve in compensation orifice.In other embodiments, polygon compensation system of connections is related to STC sprocket wheel and MDC sprocket wheel provides linear slot, and this linear slot is provided by the fixing compensated curve being provided by the static plate with required compensated curve circumference.

Owing to defining compensated curve, STC sprocket wheel can, with the cireular frequency rotation changing, make step chains can keep constant linear velocity when the STC sprocket wheel around rotation moves at it.Therefore, the polygon effect of relative speed difference of step chains of movement of the discrete chain link with splicing tpae toothed chain wheel of resulting from can be reduced (or eliminating completely possibly), as long as the speed of step chains can be now continuous and constant.In addition, the speed of the constant of step chains can be by the mean angular velocity with constant but inconstant instantaneous angular velocity (due to compensated curve) rotation MDC sprocket wheel and STC sprocket wheel guarantee.Therefore,, by reducing polygon effect, can strengthen passenger's the experience of taking.

In addition, it is a kind of in the situation that do not reduce the mechanism that the pitch (needing more substantial stepchain) of step chains reduces polygon effect that polygon compensation system of connections provides, as reduced by conventional polygon effect as mentioned above, solution instructed.Therefore, can also minimize the higher cost (resulting from number of components, the maintenance of increase and the shorter service life increasing) that traditional solution is associated with step chains and STC sprocket wheel.Therefore, polygon of the present disclosure compensation connector is not only guaranteed the more long life of step chains and STC sprocket wheel and the reduction of cost, and due to needs still less the still less joint of lubricant and noiselessness operation provide for reducing the scheme of the more environmental protection of polygon effect.In addition, this polygon compensation coupling mechanism is reliable, sane and maintains easily.

Although set forth some embodiment, according to above description, alternatives and modification will be apparent for those skilled in the art.It is of equal value and in the spirit and scope of disclosure and the accompanying claims that these and other alternatives is regarded as.

Claims

Polygon compensation system of connections (28,28', 28 "), described system comprises:

Sprocket wheel (16); And

(24,24'), it engages with described sprocket wheel (16) master driver, and described joint limits to reduce polygon effect by compensated curve (42).
2. (28,28', 28 "), is characterized in that polygon compensation system of connections according to claim 1, and described sprocket wheel (16) comprises a plurality of compensation orifices (34).
3. (28,28', 28 "), is characterized in that polygon compensation system of connections according to claim 2, and each in described a plurality of compensation orifices (34) is circumferentially spaced apart each other approximately equally spacedly.
4. polygon according to claim 2 compensates system of connections (28,28', 28 "), is characterized in that; described master driver (24,24') by corresponding wheel shaft (38), by each in described a plurality of compensation orifices (34), join described sprocket wheel (16) to.
5. polygon according to claim 4 compensates system of connections (28,28', 28 "); it is characterized in that; (24, rotation 24') causes in each in described a plurality of compensation orifices (34) of each in corresponding wheel shaft (38) according to the rotation of described compensated curve (42) described master driver.
Polygon according to claim 1 compensation system of connections (28,28', 28 "), is characterized in that, described master driver (24,24') and described sprocket wheel (16) is installed to main drive shaft (22) so that rotation.
Polygon according to claim 1 compensation system of connections (28,28', 28 "), is characterized in that, described sprocket wheel (16) and described master driver (24,24') with constant mean angular velocity, rotate.
Polygon according to claim 1 compensation system of connections (28,28', 28 "), is characterized in that, described sprocket wheel (16) and described master driver (24,24') with inconstant instantaneous angular velocity, rotate.
Polygon according to claim 1 compensation system of connections (28,28', 28 "); it is characterized in that; described sprocket wheel (16) and described master driver (24,24') there is inconstant instantaneous angular velocity, keep constant mean angular velocity simultaneously.
10. polygon according to claim 9 compensates system of connections (28,28', 28 "), is characterized in that; described master driver (24,24') cause the linear velocity of chain (12) to keep constant with the inconstant instantaneous angular velocity of described sprocket wheel (16).
11. polygon compensation systems of connections according to claim 1 (28,28', 28 "), is characterized in that, and described master driver (24,24') be main drive chain sprocket wheel.
12. polygon compensation systems of connections (28 according to claim 1,28', 28 "); it is characterized in that; described sprocket wheel (16) has more than first composition surface (51) and described master driver (24; 24') have corresponding more than second composition surface (52); and at described sprocket wheel (16) and described master driver (24; roller (38) the restriction static compensation curve (50) sliding in first and described more than second composition surface (51,52) of described correspondence 24').
13. polygons according to claim 12 compensation systems of connections (28,28', 28 "), is characterized in that, described first and described more than second composition surface (51,52) in each be linear slot.
14. polygon compensation systems of connections according to claim 1 (28,28', 28 "), is characterized in that, and described master driver (24,24') roughly directly by gear, wheel shaft and/or motor, drive.
15. 1 kinds of passenger conveyor systems (2), described system comprises:

A plurality of pedals (8), its step chains (12) in circulation loop guides for object is delivered to another place from a place around step chains sprocket wheel (16); And

Master driver (24,24'), it engages with described step chains sprocket wheel (16), along with described step chains sprocket wheel (16) and described master driver (24,24') with constant mean angular velocity but inconstant instantaneous angular velocity rotation, described joint is limited by compensated curve (42).
16. passenger conveyor systems according to claim 15 (2), is characterized in that, described step chains (12) moves with the linear velocity of constant.
17. passenger conveyor systems according to claim 15 (2), it is characterized in that, described master driver (24,24') comprise the first main drive sprocket (24,24') He the second main drive sprocket (24,24'), and described the first and second main drive sprockets (24,24') clamp described step chains sprocket wheel (16).
18. passenger conveyor systems according to claim 15 (2), it is characterized in that, described step chains sprocket wheel (16) comprises a plurality of compensation orifices (34) and described master driver (24,24') by corresponding wheel shaft (38), by each in described a plurality of compensation orifices (34), join described step chains sprocket wheel (16) to, (24, rotation 24') causes in each in described a plurality of compensation orifices (34) of each in corresponding wheel shaft (38) according to the rotation of described compensated curve (42) to make described master driver.
19. passenger conveyor systems according to claim 15 (2), it is characterized in that, described step chains sprocket wheel (16) has more than first linear slot (51) and described master driver (24,24') there is corresponding more than second linear slot (52), and at described step chains sprocket wheel (16) and described master driver (24, the roller (38) sliding in more than first and second linear slot (51,52) of described correspondence 24') limits static compensation curve (50).
20. 1 kinds of methods that reduce the polygon effect in chain drive system (2), described method comprises:

Provide by sprocket wheel (16) and master driver (24, the chain (12) 24') driving;

Make described sprocket wheel (16) and described master driver (24,24') engage;

Make described sprocket wheel (16) and described master driver (24,24') with constant mean angular velocity but inconstant instantaneous angular velocity rotation; And

Afford redress curve (42) to keep the linear velocity of the constant of described chain (12).
21. methods according to claim 20, it is characterized in that, provide described sprocket wheel (16) to be included as described sprocket wheel (16) a plurality of compensation orifices (34) are provided, and make described sprocket wheel (16) and described master driver (24,24') engage comprise by described master driver (24,24') by means of a plurality of wheel shafts (38), by described a plurality of compensation orifices (34), be connected to described sprocket wheel (16).
22. methods according to claim 21, is characterized in that, provide described compensated curve (42) also to comprise: in described a plurality of compensation orifices (34), the described a plurality of wheel shafts of guiding (38) are to limit described compensated curve (42).
23. methods according to claim 20, it is characterized in that, described sprocket wheel (16) and described master driver (24 are provided, 24') be included as described sprocket wheel (16) and described master driver (24, each 24') provides a plurality of composition surfaces (51,52) and provide described compensated curve (42) to comprise to provide static curve (50), element is at described sprocket wheel (16) and described master driver (24, in corresponding linear slot (51,52) 24'), along described static curve (50), slide.